# #673f88

A color — cool, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#673f88`
- RGB: rgb(103, 63, 136)
- HSL: hsl(273, 37%, 39%)
- OKLCH: oklch(0.448 0.121 307.5)
- Relative luminance: 0.0822
- Nearest named color: Lords of the Night (#664488, Δ 1.24) — https://brandsweets.com/colors/lords-of-the-night
- Moods: cool, modern
- Page: https://brandsweets.com/colors/673f88

## Tints & shades

- Tints (toward white): #77489d, #8754b0, #9569ba, #a47ec4, #b393cd, #bfa4d5, #ceb9df, #ddcee9, #ebe3f2, #faf8fc
- Shades (toward black): #5f3a7e, #553370, #4d2f65, #422857, #3a234d, #301d3f, #281834, #1d1226, #150d1c, #0b060e

## Harmonies

- Complementary: #60883f
- Analogous: #423f88, #883f85
- Triadic: #88673f, #3f8867
- Split-complementary: #85883f, #3f8842
- Tetradic: #88423f, #60883f, #3f8588

## Colors that go with #673f88

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #673f88: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Harbour (https://brandsweets.com/palettes/cool#harbour), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #673f88: 5 real palettes, including Hinge's brand system and Slack's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Slack (https://brandsweets.com/colors/brands/slack-com), HP (https://brandsweets.com/colors/brands/hp-com), Linkedin (https://brandsweets.com/colors/brands/linkedin-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 6 real palettes, including First Snow and Kraken's brand system put Midnight Blue beside #673f88, as that palette's text colour. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Kraken (https://brandsweets.com/colors/brands/kraken-com), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #673f88 in 6 real palettes, including Wayfair's brand system and Stripe's brand system, as the supporting colour. Seen in: Wayfair (https://brandsweets.com/colors/brands/wayfair-com), Stripe (https://brandsweets.com/colors/brands/stripe), Console Light (https://brandsweets.com/palettes/technical#console-light), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #673f88 in 4 real palettes, including Datadog's brand system and Superhuman's brand system, as that palette's text colour. Seen in: Datadog (https://brandsweets.com/colors/brands/datadoghq-com), Superhuman (https://brandsweets.com/colors/brands/superhuman-com), Dusk (https://brandsweets.com/palettes/cool#dusk), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/taupe
- **Tomato** #ff6347 [pool] — 5 real palettes, including Golden Hour and FedEx's brand system put Tomato beside #673f88, as the supporting colour. Seen in: Golden Hour (https://brandsweets.com/palettes/warm#golden-hour), FedEx (https://brandsweets.com/colors/brands/fedex-com), GitLab (https://brandsweets.com/colors/brands/gitlab), Harley-Davidson (https://brandsweets.com/colors/brands/harley-davidson-com). — https://brandsweets.com/colors/tomato
- **Dark Olive Green** #556b2f [harmony: complementary] — Dark Olive Green sits directly opposite #673f88 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/darkolivegreen
- **Blue** #0000ff [pool] — 3 real palettes, including Zillow's brand system and CVS's brand system put Blue beside #673f88, as the lead colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com). — https://brandsweets.com/colors/blue

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 7.94:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.64:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9062b7 (4.62:1); AA: background → #c4c4c4 (4.56:1); AAA: text → #ac88c8 (7.11:1); AAA: background → #f2f2f2 (7.1:1)

## Fonts for this mood

- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/673f88-b79cc4-c4cb62-2d1f2d-eae9f1?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#673f88" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.